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Fish & Aquatics

Aquarium setup, water care and fish health.

{"en": "Beginner aquarist setting up a new freshwater aquarium tank with plants and colorful fish", "es": "Acuarista principiante configurando un nuevo acuario de agua dulce con plantas y peces coloridos", "fr": "Aquariophile d\u00e9butant installant un nouvel aquarium d'eau douce avec plantes et poissons color\u00e9s", "de": "Anf\u00e4nger richtet ein neues S\u00fc\u00dfwasseraquarium mit Pflanzen und farbigen Fischen ein", "nl": "Beginnende aquariumbeheerder stelt een nieuw zoetwateraquarium in met planten en gekleurde vissen", "pt": "Aquarista iniciante configurando um novo aqu\u00e1rio de \u00e1gua doce com plantas e peixes coloridos", "it": "Acquariofilo principiante allestisce un nuovo acquario d'acqua dolce con piante e pesci colorati"}
Fish & Aquatics

What to Know Before Buying an Aquarium

Setting up an aquarium is an exciting prospect for any pet lover, but rushing into a purchase without proper planning can lead to frustration, expense, and unhappy fish. Whether you're considering your first tank or upgrading to a larger setup, understanding the fundamentals of aquarium ownership is…

Julia WrenfieldJuly 7, 2026
{"en": "Aquarium sump and overflow box system with tubing and filtration components for fish tank setup", "es": "Sistema de sumidero y caja de desbordamiento de acuario con tuber\u00edas y componentes de filtraci\u00f3n", "fr": "Syst\u00e8me de puisard et bo\u00eete de d\u00e9bordement d'aquarium avec tuyauterie et composants de filtration", "de": "Aquariumsumpf- und \u00dcberlaufsystem mit Rohren und Filtrationskomponenten f\u00fcr Fischschale", "nl": "Aquariumspoelreservoir en overloopsysteem met buizen en filtercomponenten voor vistank", "pt": "Sistema de sumidouro e caixa de transbordamento do aqu\u00e1rio com tubula\u00e7\u00e3o e componentes de filtra\u00e7\u00e3o", "it": "Sistema di sentina e scatola di troppo pieno dell'acquario con tubi e componenti di filtrazione"}
Fish & Aquatics

What to Know About Aquarium Sump and Overflow Box Setups

If you're considering an aquarium sump and overflow system for your home, understanding how these components work together is essential for maintaining a healthy aquatic environment for your fish and other water-dwelling pets. Whether you're a seasoned aquarist or setting up your first advanced syst…

Julia WrenfieldJuly 7, 2026
{"en": "Overweight betta fish with rounded belly swimming in aquarium, showing signs of obesity", "es": "Pez betta obeso con vientre redondeado nadando en acuario mostrando signos de sobrepeso", "fr": "Betta ob\u00e8se avec ventre arrondi nageant dans un aquarium pr\u00e9sentant des signes d'ob\u00e9sit\u00e9", "de": "\u00dcbergewichtiger Kampffisch mit rundem Bauch schwimmt im Aquarium und zeigt \u00dcbergewichtssymptome", "nl": "Overgewicht betta vis met ronde buik zwemmend in aquarium, vertonend overgewichtsverschijnselen", "pt": "Peixe betta obeso com barriga arredondada nadando em aqu\u00e1rio mostrando sinais de excesso de peso", "it": "Pesce betta obeso con pancia arrotondata che nuota in acquario mostrando segni di sovrappeso"}
Fish & Aquatics

What to Do If Your Betta is Too Fat

Bettas are beloved for their vibrant colours and engaging personalities, but many pet owners inadvertently overfeed these beautiful fish, leading to obesity and serious health problems. A plump betta might seem content, but excess weight can cause complications including constipation, swim bladder d…

Julia WrenfieldJuly 7, 2026
{"en": "Aquarium power cord with drip loop safety feature preventing water damage to electrical equipment", "es": "Cable de alimentaci\u00f3n de acuario con bucle de goteo para prevenir da\u00f1os por agua en equipos el\u00e9ctricos", "fr": "Cordon d'alimentation d'aquarium avec boucle anti-goutte prot\u00e9geant l'\u00e9quipement \u00e9lectrique de l'humidit\u00e9", "de": "Aquarienstromkabel mit Tropfschlinge zum Schutz elektrischer Ger\u00e4te vor Wassersch\u00e4den", "nl": "Aquariumstroomkabel met druppellusje ter bescherming van elektrische apparatuur tegen waterschade", "pt": "Cabo de alimenta\u00e7\u00e3o de aqu\u00e1rio com al\u00e7a anti-gotejamento protegendo equipamentos el\u00e9tricos da \u00e1gua", "it": "Cavo di alimentazione dell'acquario con anello antisgocciolamento che protegge l'attrezzatura elettrica dall'acqua"}
Fish & Aquatics

What Is an Aquarium Drip Loop?

If you're a pet owner with an aquarium in your home, you've likely heard the term "drip loop" mentioned by experienced aquarists and veterinary professionals. This simple yet crucial safety feature is often overlooked by beginners, yet it plays a vital role in protecting both your aquatic pets and y…

Julia WrenfieldJuly 7, 2026
{"en": "Aquarium gravel vacuum being used to clean substrate in a planted fish tank during routine maintenance", "es": "Aspiradora de grava de acuario limpiando el sustrato en un tanque de peces plantado durante el mantenimiento", "fr": "Aspirateur \u00e0 gravier d'aquarium nettoyant le substrat dans un bac \u00e0 poissons plant\u00e9 lors de l'entretien", "de": "Aquariumkiesabsauger reinigt das Substrat in einem bepflanzten Aquarium w\u00e4hrend der regelm\u00e4\u00dfigen Wartung", "nl": "Aquariumgrindaspirator reinigt het substraat in een ingeplant aquarium tijdens routineonderhoud", "pt": "Aspirador de cascalho de aqu\u00e1rio limpando o substrato em um tanque de peixes plantado durante a manuten\u00e7\u00e3o", "it": "Aspirapolvere per ghiaia dell'acquario che pulisce il substrato in una vasca di pesce piantumata durante la manutenzione"}
Fish & Aquatics

Should You Vacuum Your Aquarium Gravel?

If you're an aquarium enthusiast, you've likely wondered whether those fancy gravel vacuums are worth the investment. The short answer is: yes, regular gravel maintenance is essential for a healthy aquarium ecosystem. But understanding how, when, and why to vacuum your substrate properly can make al…

Julia WrenfieldJuly 7, 2026
{"en": "Colorful cichlid fish swimming in a well-decorated freshwater aquarium with rocks and plants", "es": "Peces c\u00edclidos coloridos nadando en un acuario de agua dulce bien decorado con rocas y plantas", "fr": "Poissons cichlid\u00e9s color\u00e9s nageant dans un aquarium d'eau douce bien am\u00e9nag\u00e9 avec roches et plantes", "de": "Farbenfrohe Buntbarsche schwimmen in einem gut dekorierten S\u00fc\u00dfwasseraquarium mit Steinen und Pflanzen", "nl": "Kleurrijke cichlidenvissen zwemmend in een goed ingerichte zoetwateraquarium met rotsen en planten", "pt": "Peixes cicl\u00eddeos coloridos nadando em aqu\u00e1rio de \u00e1gua doce bem decorado com rochas e plantas", "it": "Pesci ciclidi colorati nuotano in un acquario d'acqua dolce ben arredato con rocce e piante"}
Fish & Aquatics

How to Set Up a Cichlid Aquarium

Cichlids are amongst the most captivating freshwater fish you can keep at home, renowned for their vibrant colours, intelligent behaviour, and distinct personalities. However, these remarkable fish require more thoughtful preparation than many beginners realise. Setting up a proper cichlid aquarium …

Julia WrenfieldJuly 7, 2026
{"en": "Aquarium substrate being replaced with fresh gravel during tank maintenance and cleaning", "es": "Sustrato de acuario siendo reemplazado con grava fresca durante el mantenimiento del tanque", "fr": "Substrat d'aquarium remplac\u00e9 par du gravier frais lors de l'entretien du bac", "de": "Aquariensubstrat wird w\u00e4hrend der Tankwartung durch frischen Kies ersetzt", "nl": "Aquariumsubstraat vervangen door vers grind tijdens tankonderhoud", "pt": "Substrato do aqu\u00e1rio sendo substitu\u00eddo por cascalho fresco durante manuten\u00e7\u00e3o", "it": "Substrato dell'acquario sostituito con ghiaia fresca durante la manutenzione vasca"}
Fish & Aquatics

How to Replace Aquarium Substrate

Whether you're dealing with accumulated debris, algae buildup, or simply want to refresh your aquarium's appearance, replacing substrate is one of the most important maintenance tasks for aquatic pet owners. A clean substrate not only enhances your aquarium's visual appeal but also maintains water q…

Julia WrenfieldJuly 7, 2026
{"en": "Aquarium thermometer showing elevated water temperature with tropical fish swimming in heated tank water", "es": "Term\u00f3metro de acuario mostrando temperatura elevada del agua con peces tropicales nadando en el tanque", "fr": "Thermom\u00e8tre d'aquarium affichant une temp\u00e9rature d'eau \u00e9lev\u00e9e avec des poissons tropicaux nageant", "de": "Aquarienthermometer zeigt erh\u00f6hte Wassertemperatur mit tropischen Fischen im beheizten Aquariumbecken", "nl": "Aquariumthermometer toont verhoogde watertemperatuur met tropische vissen in het warme aquariumwater", "pt": "Term\u00f4metro do aqu\u00e1rio mostrando temperatura elevada da \u00e1gua com peixes tropicais nadando no tanque", "it": "Termometro dell'acquario che mostra temperatura elevata dell'acqua con pesci tropicali nel serbatoio"}
Fish & Aquatics

How to Lower High Water Temperature in Aquariums

Maintaining the correct water temperature is absolutely crucial for the health and wellbeing of your aquatic pets. Whether you're keeping tropical fish, delicate invertebrates, or aquatic plants, temperature fluctuations can cause stress, disease, and even death. High water temperature is one of the…

Julia WrenfieldJuly 7, 2026
{"en": "Aquarist performing water change in colorful tropical fish aquarium with plants and decorations", "es": "Acuarista realizando cambio de agua en acuario tropical colorido con peces y plantas", "fr": "Aquariophile effectuant un changement d'eau dans un aquarium tropical color\u00e9 avec poissons", "de": "Aquarianer f\u00fchrt Wasserwechsel in buntem Tropenaquarium mit Fischen und Pflanzen durch", "nl": "Aquariumhouder voert waterwisseling uit in kleurrijk tropisch aquarium met vissen en planten", "pt": "Aquarista realizando troca de \u00e1gua em aqu\u00e1rio tropical colorido com peixes e plantas", "it": "Acquariofilo che esegue il cambio dell'acqua in un acquario tropicale colorato con pesci"}
Fish & Aquatics

How to Do Aquarium Water Changes

Whether you keep colourful tropical fish, elegant goldfish, or a thriving planted aquarium, regular water changes are the foundation of a healthy aquatic environment. Yet many new aquarium enthusiasts find the process daunting or time-consuming. The truth is, performing water changes properly is str…

Julia WrenfieldJuly 7, 2026
{"en": "Tiny amphipods and copepods swimming in aquarium water, live food cultures for seahorses and marine fish", "es": "Diminutos anf\u00edpodos y cop\u00e9podos nadando en agua de acuario, cultivos de alimento vivo para caballitos de mar y peces marinos", "fr": "Minuscules amphipodes et cop\u00e9podes nageant dans l'eau de l'aquarium, cultures d'aliments vivants pour hippocampes et poissons marins", "de": "Winzige Flohkrebse und Copepoden schwimmen in Aquarienwasser, Lebendkulturen als Futter f\u00fcr Seepferdchen und Meeresfische", "nl": "Kleine amfipoden en copepoden zwemmend in aquariumwater, levende voedselvcultures voor zeepaardjes en mariene vissen", "pt": "Min\u00fasculos anf\u00edpodos e cop\u00e9podos nadando em \u00e1gua de aqu\u00e1rio, culturas de alimento vivo para cavalos-marinhos e peixes marinhos", "it": "Minuscoli anfipodi e copepodi che nuotano nell'acqua dell'acquario, colture di cibo vivo per cavallucci marini e pesci marini"}
Fish & Aquatics

How to Culture Amphipods and Copepods (for Aquarium Owners)

If you're keeping seahorses, pipefish, or other finicky marine fish, you've likely discovered that frozen foods simply won't cut it. Amphipods and copepods are nutritional powerhouses that mimic the natural diet these species would encounter in the wild. Rather than purchasing expensive live culture…

Julia WrenfieldJuly 7, 2026
{"en": "Established aquarium with fish swimming in aged tank water showing signs of chemical imbalance", "es": "Acuario establecido con peces nadando en agua envejecida mostrando signos de desequilibrio qu\u00edmico", "fr": "Aquarium \u00e9tabli avec des poissons nageant dans une eau vieillie montrant des signes de d\u00e9s\u00e9quilibre chimique", "de": "Etabliertes Aquarium mit Fischen in gealtertem Wasser mit Anzeichen chemischen Ungleichgewichts", "nl": "Gevestigd aquarium met vissen zwemmend in verouderd water met tekenen van chemische onbalans", "pt": "Aqu\u00e1rio estabelecido com peixes nadando em \u00e1gua envelhecida mostrando sinais de desequil\u00edbrio qu\u00edmico", "it": "Acquario consolidato con pesci che nuotano in acqua invecchiata mostrando segni di squilibrio chimico"}
Fish & Aquatics

Does Your Aquarium Have Old Tank Syndrome?

If you've kept an aquarium for several months or years without noticing any problems, you might assume everything is running smoothly. However, even well-established tanks can develop a silent killer known as "Old Tank Syndrome" — a gradual shift in water chemistry that devastates fish health withou…

Julia WrenfieldJuly 7, 2026
{"en": "Dead fish in toilet bowl, illustrating improper disposal method for deceased pet fish", "es": "Pez muerto en la taza del inodoro, ilustrando el m\u00e9todo incorrecto de disposici\u00f3n de peces mascotas fallecidos", "fr": "Poisson mort dans la cuvette des toilettes, illustrant la mauvaise m\u00e9thode d'\u00e9limination des poissons de compagnie d\u00e9c\u00e9d\u00e9s", "de": "Toter Fisch in der Toilettensch\u00fcssel, zeigt unsachgem\u00e4\u00dfe Entsorgung von verstorbenem Haushaltsfisch", "nl": "Dode vis in toiletpot, illustreert onjuiste verwijdering van overleden huisdiervis", "pt": "Peixe morto na tigela do vaso sanit\u00e1rio, ilustrando m\u00e9todo incorreto de descarte de peixe de estima\u00e7\u00e3o falecido", "it": "Pesce morto nella tazza del water, illustra il metodo improprio di smaltimento del pesce domestico deceduto"}
Fish & Aquatics

Why Flushing Your Fish is Not an Option

When a beloved pet fish dies, the instinct to flush it down the toilet might seem like the quickest and most dignified solution. However, this common practice is causing significant environmental damage that extends far beyond your bathroom. As a nutritionist and pet health advocate, I'm here to exp…

Julia WrenfieldJuly 7, 2026
{"en": "Colorful top-dwelling fish swimming near the water surface in a well-lit aquarium with green plants", "es": "Peces de superficie coloridos nadando cerca de la parte superior del acuario con plantas verdes", "fr": "Poissons de surface color\u00e9s nageant pr\u00e8s du haut d'un aquarium bien \u00e9clair\u00e9 avec plantes vertes", "de": "Bunte Oberfl\u00e4chenfische schwimmen nahe der Wasseroberfl\u00e4che in einem hellen Aquarium mit gr\u00fcnen Pflanzen", "nl": "Kleurrijke oppervlaktevissen zwemmend dicht bij het wateroppervlak in een verlicht aquarium met groene planten", "pt": "Peixes coloridos de superficie nadando perto do topo do aqu\u00e1rio com plantas aqu\u00e1ticas verdes", "it": "Pesci colorati di superficie che nuotano vicino alla parte superiore dell'acquario con piante verdi"}
Fish & Aquatics

How to Stock an Aquarium with Top Dwelling Fish

Creating a thriving aquarium starts with understanding which fish species will thrive in your setup, and top-dwelling fish offer a wonderful way to add visual interest and activity to the upper levels of your tank. These surface-loving swimmers bring life and movement to areas often overlooked by ot…

Julia WrenfieldJuly 7, 2026
{"en": "Vibrant saltwater angelfish swimming among coral in a marine aquarium with blue water background", "es": "Pez \u00e1ngel marino vibrante nadando entre coral en un acuario de agua salada", "fr": "Poisson-ange marin color\u00e9 nageant parmi les coraux dans un aquarium d'eau sal\u00e9e", "de": "Leuchtend gef\u00e4rbter Salzwasser-Kaiserfisch schwimmt zwischen Korallen im Meerwasseraquarium", "nl": "Levendige zoutwaterangelvissen zwemmend tussen koralen in een mariene aquariumomgeving", "pt": "Peixe-anjo marinho vibrante nadando entre corais em aqu\u00e1rio de \u00e1gua salgada", "it": "Pesce angelo marino colorato che nuota tra i coralli in un acquario d'acqua salata"}
Fish & Aquatics

How to Choose the Best Saltwater Angelfish for Your Aquarium

Saltwater angelfish are amongst the most captivating additions to any marine aquarium, offering vibrant colours, graceful movements, and distinct personalities that can transform your underwater environment. However, selecting the right species requires careful consideration of your tank's capacity,…

Julia WrenfieldJuly 7, 2026
{"en": "Colorful koi fish swimming in indoor aquarium tank with aquatic plants and filtered water", "es": "Peces koi coloridos nadando en acuario interior con plantas acu\u00e1ticas y agua filtrada", "fr": "Poissons koi color\u00e9s nageant dans un aquarium int\u00e9rieur avec plantes aquatiques", "de": "Bunte Koifische schwimmen in einem Indoor-Aquarium mit Wasserpflanzen", "nl": "Gekleurde koivissen zwemmend in binnenbak met waterplanten en gefilterd water", "pt": "Peixes koi coloridos nadando em aqu\u00e1rio interno com plantas aqu\u00e1ticas", "it": "Carpe koi colorate che nuotano in vasche acquario indoor con piante acquatiche"}
Fish & Aquatics

Can I Keep My Koi Fish Inside?

Koi fish are magnificent creatures that capture the imagination of many aquatic enthusiasts. Their stunning colours, intelligent personalities, and impressive size make them highly desirable pets. However, a common question arises: can koi thrive in an indoor environment? The short answer is that wh…

Julia WrenfieldJuly 7, 2026
{"en": "Goldfish resting motionless near aquatic plants at the bottom of a tank during sleep", "es": "Pez dorado descansando inm\u00f3vil cerca de plantas acu\u00e1ticas en el fondo del acuario durante el sue\u00f1o", "fr": "Poisson rouge au repos immobile pr\u00e8s des plantes aquatiques au fond de l'aquarium pendant le sommeil", "de": "Goldfisch ruht bewegungslos neben Wasserpflanzen am Boden des Aquariums w\u00e4hrend des Schlafs", "nl": "Goudvis rust bewegingloos bij waterplanten op de bodem van het aquarium tijdens slaap", "pt": "Peixe-dourado descansando im\u00f3vel perto de plantas aqu\u00e1ticas no fundo do aqu\u00e1rio durante o sono", "it": "Pesce rosso a riposo immobile vicino alle piante acquatiche sul fondo dell'acquario durante il sonno"}
Fish & Aquatics

Do Goldfish Sleep? Sleeping Behaviour Explained

If you've ever watched your goldfish late at night, you might have noticed they seem oddly still, hovering near the bottom of the tank or nestled amongst the plants. This behaviour often leaves owners wondering: do goldfish actually sleep? The answer is yes – but not quite in the way you might imagi…

Julia WrenfieldJuly 7, 2026
{"en": "Colorful tropical fish swimming in clear aquarium water with plants and substrate", "es": "Peces tropicales coloridos nadando en agua clara del acuario con plantas y sustrato", "fr": "Poissons tropicaux color\u00e9s nageant dans une eau cristalline d'aquarium avec plantes", "de": "Bunte Tropenfische schwimmen in klarem Aquarienwasser mit Pflanzen und Bodengrund", "nl": "Kleurrijke tropische vissen zwemmend in helder aquariumwater met planten en substraat", "pt": "Peixes tropicais coloridos nadando em \u00e1gua clara do aqu\u00e1rio com plantas e substrato", "it": "Pesci tropicali colorati che nuotano in acqua cristallina dell'acquario con piante"}
Fish & Aquatics

Tropical Fish Water Parameters

Water chemistry is the invisible foundation of every successful aquarium. Fish cannot regulate their own internal chemistry the way mammals can — they…

Julia WrenfieldJuly 2, 2026
{"en": "Close-up of a fish's eye and head showing detailed scales and gill structure, highlighting fish sensory capabilities", "es": "Primer plano del ojo y cabeza de un pez mostrando escamas detalladas y estructura branquial, destacando las capacidades sensoriales", "fr": "Gros plan de l'\u0153il et de la t\u00eate d'un poisson montrant les \u00e9cailles d\u00e9taill\u00e9es et la structure des branchies, mettant en \u00e9vidence les capacit\u00e9s sensorielles", "de": "Nahaufnahme eines Fischauges und Kopfes mit detaillierten Schuppen und Kiemenstruktur, die Sinnesf\u00e4higkeiten von Fischen hervorhebend", "nl": "Close-up van het oog en hoofd van een vis met gedetailleerde schubben en kieuwen, die de sensorische capaciteiten van vissen benadrukken", "pt": "Close-up do olho e cabe\u00e7a de um peixe mostrando escamas detalhadas e estrutura branquial, destacando as capacidades sensoriais dos peixes", "it": "Primo piano dell'occhio e della testa di un pesce con scaglie dettagliate e struttura branchiale, evidenziando le capacit\u00e0 sensoriali dei pesci"}
Fish & Aquatics

Can Fish Feel Pain? What Science Now Says

For most of human history, fish were assumed to be automata — biological machines that responded to stimuli without any subjective experience of…

Julia WrenfieldJuly 2, 2026
{"en": "Healthy goldfish swimming in a well-maintained aquarium with plants and decorations", "es": "Pez dorado saludable nadando en un acuario bien mantenido con plantas y decoraciones", "fr": "Poisson rouge en bonne sant\u00e9 nageant dans un aquarium bien entretenu avec plantes", "de": "Gesunder Goldfisch schwimmt in einem gepflegten Aquarium mit Pflanzen und Dekoration", "nl": "Gezonde goudvis zwemmend in een goed onderhouden aquarium met planten en decoraties", "pt": "Peixe dourado saud\u00e1vel nadando em aqu\u00e1rio bem mantido com plantas e decora\u00e7\u00f5es", "it": "Pesce rosso sano che nuota in un acquario ben mantenuto con piante e decorazioni"}
Fish & Aquatics

Goldfish Care Guide Europe

The idea that goldfish live only two or three years is one of the most persistent and damaging myths in the pet trade. In reality, a well-cared-for…

Julia WrenfieldJuly 2, 2026

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